/*- * Copyright (c) 1998 Doug Rabson * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/lib/libio/swiz.c,v 1.3.2.1 2000/12/11 01:03:20 obrien Exp $ * $DragonFly: src/lib/libio/Attic/swiz.c,v 1.2 2003/06/17 04:26:49 dillon Exp $ */ #include #include #include #include #include #include #include #include #include #include "io.h" #define mb() __asm__ __volatile__("mb" : : : "memory") #define wmb() __asm__ __volatile__("wmb" : : : "memory") static int mem_fd; /* file descriptor to /dev/mem */ static void *swiz_ports; /* mapped io ports */ static u_int64_t swiz_io_base; /* physical address of ports */ static u_int64_t swiz_mem_base; /* physical address of sparse mem */ static u_int64_t swiz_dense_base; /* physical address of dense mem */ static u_int64_t swiz_hae_mask; /* mask address bits for hae */ static u_int32_t swiz_hae; /* cache of current hae */ static void swiz_init() { size_t len = sizeof(u_int64_t); int error; mem_fd = open(_PATH_MEM, O_RDWR); if (mem_fd < 0) err(1, _PATH_MEM); swiz_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0); if ((error = sysctlbyname("hw.chipset.ports", &swiz_io_base, &len, 0, 0)) < 0) err(1, "hw.chipset.ports"); if ((error = sysctlbyname("hw.chipset.memory", &swiz_mem_base, &len, 0, 0)) < 0) err(1, "hw.chipset.memory"); if ((error = sysctlbyname("hw.chipset.dense", &swiz_dense_base, &len, 0, 0)) < 0) err(1, "hw.chipset.memory"); if ((error = sysctlbyname("hw.chipset.hae_mask", &swiz_hae_mask, &len, 0, 0)) < 0) err(1, "hw.chipset.memory"); } static int swiz_ioperm(u_int32_t from, u_int32_t num, int on) { u_int64_t start, end; void *addr; if (!swiz_ports) swiz_init(); if (!on) return -1; /* XXX can't unmap yet */ start = trunc_page(from << 5); end = round_page((from + num) << 5); addr = swiz_ports + start; munmap(addr, end - start); mmap(addr, end - start, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, swiz_io_base + start); return 0; } static u_int8_t swiz_inb(u_int32_t port) { mb(); return SPARSE_READ_BYTE(swiz_ports, port); } static u_int16_t swiz_inw(u_int32_t port) { mb(); return SPARSE_READ_WORD(swiz_ports, port); } static u_int32_t swiz_inl(u_int32_t port) { mb(); return SPARSE_READ_LONG(swiz_ports, port); } static void swiz_outb(u_int32_t port, u_int8_t val) { SPARSE_WRITE_BYTE(swiz_ports, port, val); wmb(); } static void swiz_outw(u_int32_t port, u_int16_t val) { SPARSE_WRITE_WORD(swiz_ports, port, val); wmb(); } static void swiz_outl(u_int32_t port, u_int32_t val) { SPARSE_WRITE_LONG(swiz_ports, port, val); wmb(); } struct swiz_mem_handle { u_int32_t phys; /* address in PCI address-space */ void *virt; /* address in user address-space */ u_int32_t size; /* size of mapped region */ }; static void * swiz_map_memory(u_int32_t address, u_int32_t size) { struct swiz_mem_handle *h; h = malloc(sizeof(struct swiz_mem_handle)); if (!h) return 0; h->phys = address; h->virt = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, swiz_mem_base + ((address & ~swiz_hae_mask) << 5)); if ((long) h->virt == -1) { free(h); return 0; } h->size = size << 5; return h; } static void swiz_unmap_memory(void *handle, u_int32_t size) { struct swiz_mem_handle *h = handle; munmap(h->virt, h->size); free(h); } static void swiz_sethae(vm_offset_t phys) { u_int32_t hae = phys & swiz_hae_mask; if (hae != swiz_hae) { alpha_sethae(hae); swiz_hae = hae; } } static u_int8_t swiz_readb(void *handle, u_int32_t offset) { struct swiz_mem_handle *h = handle; swiz_sethae(h->phys + offset); return SPARSE_READ_BYTE(h->virt, offset); } static u_int16_t swiz_readw(void *handle, u_int32_t offset) { struct swiz_mem_handle *h = handle; swiz_sethae(h->phys + offset); return SPARSE_READ_WORD(h->virt, offset); } static u_int32_t swiz_readl(void *handle, u_int32_t offset) { struct swiz_mem_handle *h = handle; swiz_sethae(h->phys + offset); return SPARSE_READ_LONG(h->virt, offset); } static void swiz_writeb(void *handle, u_int32_t offset, u_int8_t val) { struct swiz_mem_handle *h = handle; swiz_sethae(h->phys + offset); SPARSE_WRITE_BYTE(h->virt, offset, val); } static void swiz_writew(void *handle, u_int32_t offset, u_int16_t val) { struct swiz_mem_handle *h = handle; swiz_sethae(h->phys + offset); SPARSE_WRITE_WORD(h->virt, offset, val); } static void swiz_writel(void *handle, u_int32_t offset, u_int32_t val) { struct swiz_mem_handle *h = handle; swiz_sethae(h->phys + offset); SPARSE_WRITE_LONG(h->virt, offset, val); } struct io_ops swiz_io_ops = { swiz_ioperm, swiz_inb, swiz_inw, swiz_inl, swiz_outb, swiz_outw, swiz_outl, swiz_map_memory, swiz_unmap_memory, swiz_readb, swiz_readw, swiz_readl, swiz_writeb, swiz_writew, swiz_writel, };